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Wisconsin

$65+ Cheap flights from Ontario (ONT) to Wisconsin

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Mar 27 — Apr 31
Fri 3/27
Fri 4/3
1 adult, Economy
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Cheap flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 25, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
-
MSP
1 stop6h 42m
Frontier
Wed 4/1511:15 am
MSP
-
ONT
1 stop14h 40m
Frontier
Deal found 2/22$141
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
-
MSP
1 stop20h 59m
Frontier
Fri 4/241:30 pm
MSP
-
ONT
1 stop12h 25m
Frontier
Deal found 2/24$166
This Trip.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:15 am
ONT
-
MSP
1 stop15h 42m
Frontier
Tue 3/246:21 pm
MSP
-
ONT
1 stop7h 38m
Frontier
Deal found 2/23$167
This Frontier deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
-
MSP
1 stop6h 42m
Frontier
Fri 4/241:30 pm
MSP
-
ONT
1 stop12h 25m
Frontier
Deal found 2/23$190
This Frontier deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
-
MSP
1 stop8h 03m
Frontier
Thu 4/2311:47 am
MSP
-
ONT
1 stop14h 08m
Frontier
Deal found 2/23$192
This Booking.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:59 am
ONT
-
MSP
1 stop8h 03m
Frontier
Sun 4/266:45 am
MSP
-
ONT
1 stop26h 46m
Frontier
Deal found 2/25$197
This CheapOair deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:43 pm
ONT
-
MSP
1 stop15h 19m
Frontier
Sun 5/36:45 am
MSP
-
ONT
1 stop26h 46m
Frontier
Deal found 2/24$201
This Booking.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
-
MSP
1 stop20h 59m
Frontier
Sun 4/196:45 am
MSP
-
ONT
1 stop26h 46m
Frontier
Deal found 2/22$203
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:20 am
ONT
-
MSP
1 stop9h 09m
Frontier
Wed 4/1511:15 am
MSP
-
ONT
1 stop14h 40m
Frontier
Deal found 2/24$205
This Frontier deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:20 am
ONT
-
MSP
1 stop9h 09m
Frontier
Sun 4/2611:47 am
MSP
-
ONT
1 stop14h 09m
Frontier
Deal found 2/23$211
This Trip.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/233:30 pm
ONT
-
ORD
1 stop12h 38m
Frontier
Wed 3/258:55 pm
ORD
-
ONT
1 stop12h 17m
Frontier
Deal found 2/24$216
This Booking.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:59 pm
ONT
-
ORD
1 stop7h 09m
Frontier
Mon 4/2010:55 am
ORD
-
ONT
1 stop15h 00m
Frontier
Deal found 2/24$218

Find flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated February 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$141
(Kiwi.com)

One-way from

$65
(Trip.com)

Popular in

February

Cheapest in

August

Average price

$494
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
Search Deals
From Ontario to Wisconsin
Search Deals
One-way flight from Ontario to Wisconsin
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 25, 2026.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Ontario

Fly to

Wisconsin

Route

Depart

Return

Price

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Fri 5/1

11:53 am-10:51 pm

2 stops8h 58m

Madison Truax Field

Tue 5/5

6:00 am-5:15 pm

2 stops13h 15m

$319

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 3/19

11:59 pm-6:02 am

Nonstop4h 03m

Chicago O'Hare Intl

Tue 3/24

7:52 pm-10:18 pm

Nonstop4h 26m

$335

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 5/5

7:00 am-1:03 pm

Nonstop4h 03m

Chicago O'Hare Intl

Fri 5/8

8:04 pm-10:30 pm

Nonstop4h 26m

$335

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 4/9

6:00 am-5:17 am

1 stop21h 17m

Minneapolis St Paul

Tue 4/28

11:10 am-10:37 pm

2 stops13h 27m

$339

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 4/8

1:20 pm-9:34 pm

1 stop6h 14m

Chicago O'Hare Intl

Tue 4/14

11:00 am-9:00 pm

2 stops12h 00m

$348

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Wed 3/25

11:59 am-10:58 pm

2 stops8h 59m

Madison Truax Field

Mon 3/30

6:04 pm-11:51 pm

2 stops7h 47m

$374

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 3/26

1:50 pm-11:52 pm

1 stop8h 02m

Chicago O'Hare Intl

Thu 4/2

8:00 pm-10:26 pm

Nonstop4h 26m

$375

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 4/25

4:52 pm-9:12 am

2 stops14h 20m

Green Bay Austin-Straubel

Sat 5/16

7:30 am-6:37 pm

2 stops13h 07m

$394

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

Wed 3/25

2:20 pm-12:05 am

2 stops7h 45m

Milwaukee-Mitchell

Mon 3/30

4:55 pm-11:35 pm

2 stops8h 40m

$394

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Sat 5/2

5:00 am-2:16 pm

1 stop7h 16m

Madison Truax Field

Tue 5/5

5:29 pm-10:30 pm

1 stop7h 01m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 60 results
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2
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6

Best time to book a flight from Ontario to Wisconsin

Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Wisconsin

What is the cheapest month to book a flight from Ontario to Wisconsin?

Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $98). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Wisconsin. Reviews last updated February 25, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,300 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,300 reviews
Southwest
8.0
Very good
4,300 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,237 reviews
Southwest
8.0
Very good
4,300 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,345 reviews
Southwest
8.0
Very good
4,300 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,345 reviews
Southwest
8.0
Very good
4,300 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

  • How long is the flight from Ontario to Wisconsin?

    Delta, United Airlines, and Alaska Airlines can get you from Ontario to Wisconsin in just under 4h 03m. Your travel time can differ by up to 12h 11m. Airlines will cover a distance of 1695 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Wisconsin one-way?

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $114 and $159, respectively.

  • What are the most popular routes from Ontario to Wisconsin?

    The most popular flight routes from Ontario to Wisconsin are Ontario - Chicago O'Hare Intl, Ontario - Minneapolis St Paul and Ontario - Milwaukee-Mitchell.

  • Can I find deals for flights from Ontario to Wisconsin that include hotel bookings?

    Yes. In addition to deals on Ontario to Wisconsin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Wisconsin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Wisconsin.

  • Can I find deals for business class flights from Ontario to Wisconsin?

    Yes. Cheapflights offers flight deals from Ontario to Wisconsin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Wisconsin?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $98). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ontario to Wisconsin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Wisconsin

Discover the top 4 airlines that operate flights from Ontario to Wisconsin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$391FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$583FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$514FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$409FlexibilityNo cancel feeOn-time63%

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